Magnetic separator.



PATENTED AUG. 9, 1904.

M. DINGS.. MAGNETG SEPARATGR.

APPLIUATION FILED AUG. 7, 190s.

no MDEL.

Patented August 9, 1904,

Partnr OFFICE.

MYRON DING-S, OF MlLlVAUKlClG, VVISGONSIN.

MAGNETl FEEFARATH..

SPECIFICATION forming part of' Letters Patent No. 767,105, dated August9, 1904,

Application filed August 7, 1903. Serial No. 168,581. (No modeld T0 allwhom t may con/cern:

Be it known that I, MYRON DINGs, a citixen of the United States,residing at Milwaukee, county of Milwaukee, and State of Visconsin, haveinvented new and useful Improvements in Magnetic Separators, of whichthe following is a specification.

My invention relates to improvements in magnetic separators.

The object of' my invention is to provide a form of apparatus especiallyadapted for occasional use and for the magnetical separation ofcomparatively small quantities of' material or material containing butlittle iron, insuflicient to justify the maintenance or operation ofmachine-driven mechanism.

My invention therefore contemplates the provision ot' apparatus whichcan be manually controlled and operated, the magnet and its pole-piecesbeing' stationary and intermit tingly energized.

In the following description reference is had to the accompanyingdrawings, in which-M Figure 1 is a central vertical sectional view of myinvention. Fig. 2 is a cross-sectional view drawn on line a' a' ofFig. 1. Fig. 3 is detail side view oi' the lower portion of the machine,showing' the lever for oscillating the slide and controlling theenergizing-current.

Like parts are identified by the same reference characters throughoutthe several views.

1 is the coil of' a stationary electromagnet, of which 2 is the core,provided with flanged pole-pieces 23 and L1, respectively. The polepiece3 is in the form of a disk flange covering the winding of the magnet.The polepiece 4. comprises a disk fiange u. and a cylindrical flange thelatter projecting upwardly from the rim of the flange ci and partiallyinclosing the magnet-winding, as shown in Fig. 1. The pole-piece isprovided with a depending' non-magnetic cylindrical flange 5, which lapsover the upper edge of' the iiange 6 is a distributing-cone ofnon-magnetic niaterial, and 7 is a hopper arranged to discharge materialupon the cone, from which it is distributed over the surfaces of thecone and permitted to fall past the outer edges of the polcpiece 3.

The magnetite is collected in the magnetic field and drawn inwardlyagainst the flange 5, the direction o1 the magnetic lines of torce beingindicated by dotted lines in Fig. 1. Staf tionary slides 9 are used forconcentrating' the material underneath the magnet, whereby the same isdelivered to a tilting slide 1l), mounted upon a shaft 11 and operatedby means oit' a lever 12, secured to one outer end of' the shaft. YWhenthe magnet is energized, the slide 10 is adjusted, as shown in Fig. 1,and discharges the non-magnetic material into a receiver 12%. lNhen themagnet is deenergized, the slide 1() is adjusted to the position inwhich it is indicated by dotted lines in Fig. 1, when it discharges intothe receiver 14.

'lt will be observed, Fig. 3, that the lever 12 controls theenergizing-current. This is accomplished by providing suitablecontact-segments 15 and 16, respectively, the latter representingterminals of' an electrical current which includes the magnet. vWhen thelever 12 occupies the position in which it is shown in Fig. 3, acoi'itact-shoe 17, carried bythe lever, bears resiliently on thecontactsegments 15 and 16 and electrically connects them to close thecircuit through the electromagni-it. The contact oi the shoe 17 with theterminal seg ments 15 and. 16 is maintained when the lever is oscillateduntil the latter has nearly coinpleted its movement, when thecontact-shoe 17 passes upon the .insulated sections 18 and 19, thusbreaking' the circuit through the electromagnet and deenergizing thelatter, the slide l() being then in position to discharge the materialinto the receiver 1&1,

22 is an ordinary switch 'for cutting' out the entire apparatus when notin use.

1t will be observed that the hopper 7 is supported from the trame-post23 through the medium et' frame-brackets 2a and hopperbrackets V25,connected by adjusting-bolts 26,

the latter having thumb-nuts at their upper ends, whereby they may beadjusted manually. As the mouth 2&5 of the hopper T is directly over theapex et the distrilniting-cone (i, it is obvious that hy raising orlowering the hopper the feed oi' the material will be regulated by thecone, which serves as a valve.

AReviewing the operation ol the device, the apparatus is lirst connectedup with a source IOO of electrical energy through the medium of theswitch 22. The lever l2 is then swung to the position in which it isshown in Fig. 3, the slide 10 being' thereby adjusted to the position inwhich it is shown in-Fig. 1 and the electromagnet energized by closingthe circuit through the magnet by means of the contact-shoe 17 moving onthe terminal segments 15 and 16. The material to be separated is thenfed into the hopper 7, from which it is distributed by the cone 6through the magnetic field, and the magnetite collected on the edge ofpole-piece 3 and liange 5. The nonmagnetic material passes downwardly tothe slide 10, which feeds it into the receiver 13. Then the hopper isempty, the lever 12 is oscillated to remove the contact-shoe 17 from-the terminals 15 and 16 to the insulated segments 18 and 19 andsimultaneously reverse the slide 10 to the position in which it is shownin dotted lines in Fig. 1. The electromagnet being deenergized bybreaking the circuit between terminals 15 and 16, the mag'- netite ispermitted to drop upon the slide and pass to the receiver 14.

On one end of shaft 11 is a spring' 34, one of which is attached to setcollar 36 and the other end to the box-bearing 35, thus maintaining atwist tension on shaft 11, so that when the lever 12 is released thetilting slide 10 is thrown back into position, as shown by dotted linesin Fig. 1.

By providing the electromagnet with independent series of concentricwindings, as indicated at e, f, and r and connecting the winding eseverally with an insulated section e of the contact-segment 15, whileboth windings e and fare connected with a section f/ and all three withthe main section g, the magnet may be energized and deenergized moregradually than if a single winding were used, thus avoiding excessivearcing or flashing.

vWhere it is desired to leave the machine unattended during itsoperation, a holdingelectromagnet 37 is provided, the lever serving asan armature for the holding-magnet. The holding-magnet retains the leverwith the slide, as shown in Fig. 1 and by dotted lines in Fig. 3, andwhen the holding-magnet is denergized the lever is released, and thespring 34 then operates to reverse the slide. The holdingelectromagnetis energized, through conductors 38 39, from the same source from whichthe energizing-current of the separator-magnet is received, so that anyinterruption of the current causes the instant release of the lever andreversal of the slide, whereby the magnetized materials are dischargedinto the proper receiver.

In some cases it is'desirable to operate the lever 12 by foot-power.This is accomplished by a treadle 30 and link 31, connected to an arm 32of the lever 12, as shown in Fig. 3. Usually, however, where the treadleis used the holding-magnet is disconnected and the tension of spring 34reversed, so that the treadle-pressure operates in opposition to thespring tension.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isw

1. In a magnetic separator, the combination of an electromagnet having asubstantially vertical axis; a cup-shaped lower polepiece partiallyinclosing the magnetic winding; an upper pole-piece covering the magnetand projecting' marginally therefrom; a non-magnetic ring of lessdiameter than the upper pole-piece, but connected to the latter andarranged to cover the upper edge of the lower pole-piece; and a conicaldistributingshield covering the upper pole-piece except at its marginaledges.

2. In a magnetic separator, the combination of an electromagnet having asubstantially vertical axis; a cup-shaped lower polepiece partiallyinclosing the magnetic winding; an upper pole-piece covering the magnetand projecting marginally therefrom; a non-magnetic ring of lessdiameter than the upper pole-piece, but connected to the latter andarranged to cover the upper edge of the lower pole-piece; and a conicaldistributingshield covering the upper pole-piece except at its marginaledges; together with a tilting slide of greater dimensions than thediameter of the magnet and having a pivot-shaft located substantiallyacross the axial line of the magnet.

3. The combination of a tilting slide arranged to oscillate over acentral pivot-rod with opposing edges crossing the horizontal plane ofsaid rod when the slide is tilted; an actuating-lever connected withsaid slide; an electromagnet of less diameter than either the length orwidth of the slide, located with its central axis extending inasubstantially vertical direction above the pivot-shaft of the slide;and a distributing-cone located above said magnet; together with meansfor feeding material to the apex of the cone.

4. The combination of a tilting slide arranged to oscillate over acentral pivot-rod, with opposing edges crossing the horizontal plane ofsaid rod when the slide is tilted; an actuating-lever connected withsaid slide; an electromagnet of less diameter than either the length orwidth of the slide, located with its central axis extending in asubstantially vertical direction above the pivot-shaft of the slide; anda distributing-cone located above said magnet; together with means forfeeding material to the apex of the cone, and a circuit-closer connectedwith the slide-actuating lever and included in the energizing-circuit ofsaid magnet.

5. In an electromagnetic separator the combination with an electromagnetof a pivotal IOO IIO

receiving-slide; aspringarranged to normally pending the duration o tlieenergizing-eurliold the slide in one position of adjustment; rent. I0 alever for reversing' the position of the slide; In testimony Whereol Iai'iix my signature in and a holdingmagnet energized from the thepresence of tWo Witnesses.

same source of electricity as that which sup- MYRON DINGS.

plies the separator, and arranged to hold said Vitnesses:

lever against the tension of said spring when CHAs. B. PERRY,

the latter is adjusted in proximity to it and LEVERETT C. VHEELER.

